⬇️Download

All available Squirrel downloads

Planned for next version

• Minor code and documentation changes

Version 2025.12.09

850KB

Squirrel-2025.12.09.zip

archive

Open

• Include JAddin version 2025.11.27

• Change version number scheme from n.n.n to yyyy.mm.dd

• Treat "Login failed: Read timed out" as temporary error

• Minor code and documentation changes

• Changed file in this release: Squirrel.jar

Version 1.6.13 (2025-09-26)

850KB

Squirrel-1.6.13.zip

archive

Open

• Backend: Enforce timeout in connection test to avoid possible connection hangups

• Minor code and documentation changes

• Changed file in this release: Squirrel.jar

Version 1.6.12 (2025-09-23)

850KB

Squirrel-1.6.12.zip

archive

Open

• Backend: Remove BATV header from recipient address (see https://en.wikipedia.org/wiki/Bounce_Address_Tag_Validation)

• Backend: Sort mail properties in Jakarta debug log

• Minor code and documentation changes

• Changed file in this release: Squirrel.jar

Version 1.6.11 (2025-08-11)

850KB

Squirrel-1.6.11.zip

archive

Open

• Backend: Create new Jakarta Mail Session for each Connection (instead of using previous Connection)

• Backend: More cleanup code added to avoid rare connection hangups in Jakarta Mail API

• Backend: Force the use of a 10 second timeout for session connect/read

• Minor code and documentation changes

• Changed file in this release: Squirrel.jar

Version 1.6.10 (2025-06-21)

850KB

Squirrel-1.6.10.zip

archive

Open

• Include updated JAddin 2.2.1 framework

• Backend: Treat connection error "* BYE Connection closed" as temporary error

• Minor code and documentation changes

• Changed file in this release: Squirrel.jar

Version 1.6.9 (2025-06-20)

851KB

Squirrel-1.6.9.zip

archive

Open

• Backend: Support "SingleRun" parameter to terminate Squirrel after processing all subscription documents (see Start / Stop Squirrel)

• Changed file in this release: Squirrel.jar

Version 1.6.8 (2025-05-05)

851KB

Squirrel-1.6.8.zip

archive

Open

• Backend: Add message to connection errors with link to website with debugging information.

• Backend: Add connect timeout (10 secs) to avoid infinite hang-up

• Backend: Added more recovery for temporary mail server errors

• Backend: Improved performance and resilience during shutdown

• Changed file in this release: Squirrel.jar

Version 1.6.7 (2024-09-03)

849KB

Squirrel-1.6.7.zip

archive

Open

• Include JAddin 2.1.4 framework to support HCL Domino 14.5 and higher (JVM with Java 17)

Version 1.6.6 (2024-05-28)

852KB

Squirrel-1.6.6.zip

archive

Open

• Debug mode: Show HCL Domino JVM classpath during startup

• Treat server error "[SYS/TEMP] Internal error occurred" as temporary error

• Some minor code changes and optimizations

Version 1.6.5 (2023-12-22)

854KB

Squirrel-1.6.5.zip

archive

Open

• Prevent logging of user credentials in Jakarta Mail debug log (Squirrel-Debug-yyyy-mm-dd.log)

• Check connection to POP3/IMAP host before processing messages

Version 1.6.4 (2023-12-16)

843KB

Squirrel-1.6.4.zip

archive

Open

• Check if correct Java Mail API classes are installed

• Minor code changes during connection cleanup

• Add special handling for invalid formatted messages causing errors, e.g. "Unable to load BODYSTRUCTURE"

• Include JAddin 2.1.3 framework

Version 1.6.3 (2023-08-05)

842KB

Squirrel-1.6.3.zip

archive

Open

• Support for emails which are represented in Java as java.io.ByteArraylnputStream

• Prevent log message "duplex close of socket"

Version 1.6.2 (2023-06-21)

842KB

Squirrel-1.6.2.zip

archive

Open

• Use envelope <Return-Path> or <X-Envelope-From> if no valid sender found in mail body

• Fix for duplicate cc: and bcc: recipients

• Connection error "BAD User is authenticated but not connected" is now handled as temporary to avoid disabling the subscription document (occurs often in Microsoft 365)

• Enhance server licensing

• Minor text changes in Jakarta Mail debug log

• Include SOFA 1.0.1 (minor fixes)

• Documentation: Product website moved to https://squirrel.k43.ch

Version 1.6.1 (2022-10-24)

843KB

Squirrel-1.6.1.zip

archive

Open

• Minor adjustments in debug logging

• Treat errors during OAuth 2.0 authentication as temporary errors to prevent disabling of subscription documents

• Field validation error for OAuth 2.0 fixed

• Encrypt client value/secret field for OAuth 2.0

Version 1.6.0 (2022-10-19)

843KB

Squirrel-1.6.0.zip

archive

Open

• Add additional fields in account document for OAuth 2.0

• OAuth 2.0 support for IMAP and POP3

• Include the freeware SOFA 1.0.0 framework for OAuth 2.0 authentication

• Added file SOFA-Logging.properties to the distribution packet to parameterize the OAuth 2.0 debug logging (see Debugging Tips)

Version 1.5.2 2022-08-15

780KB

Squirrel-1.5.2.zip

archive

Open

• Handle X.509 Internet encrypted messages

• Add more detailed debugging information

• Do not automatically convert to UTF-8 charset

• Ignore MIME encoding errors for invalid Internet messages

• Ignore unknown/unsupported MIME encoding specifications

Version 1.5.1 2021-04-13

779KB

Squirrel-1.5.1.zip

archive

Open

Download

If you are upgrading from Squirrel version 1.5.0, you need to delete the two files

• 1-Squirrel-Activation.jar

• 1-Squirrel-Jakarta.jar

from the directory 'Domino/ndext'

• Add free version with a limit of three active mail subscriptions

• Support coexistence with HCL Traveler

Version 1.5.0 2021-03-23

831KB

Squirrel-1.5.0.zip

archive

Open

Download

• Option in configuration document to send all user account errors to the administrator

• Include JAddin 2.1.2 framework (minor fixes)

• Include Eclipse Jakarta Mail and Eclipse Jakarta Activation to replace older JavaMail API

• Write logging from Jakarta Mail API during active debugging to file 'Squirrel-Debug-YYYY-MM-DD.log' (see Debugging Tips)

• Squirrel documentation updated and moved to GitBook

• Experimental support for OAuth 2.0 authentication (Client XOAUTH2). This feature is currently in a beta phase. Please send any feedback to [email protected]

Version 1.4.2 2021-01-01

150KB

Squirrel-1.4.2.zip

archive

Open

Download

• Show warning message at startup if defined maximum Java heap size is less than 256MB

• Add Domino statistic 'Squirrel.Messages.LastConnectTime' with time of last successful POP3/IMAP server connection

• Remove some original MIME headers to avoid duplicate MIME headers (RFC 5322)

• Added several code enhancements in processing MIME message content

• Minor documentation changes

Version 1.4.1 2020-10-18

149KB

Squirrel-1.4.1.zip

archive

Open

Download

• Preserve original recipient fields (To, Cc, Bcc)

• Disable adding Domino domain name (e.g. @ACME) in recipient address

• Handle empty To/From address

• Support RFC 2047 encoded header fields

• Minor documentation changes

Version 1.4.0 2020-09-17

148KB

Squirrel-1.4.0.zip

archive

Open

Download

• Support recipient lookup for large Domino directories

• Support manual entry of recipients (e.g. for group names or mail-in databases)

• Minor documentation changes

Version 1.3.4 2020-08-02

147KB

Squirrel-1.3.4.zip

archive

Open

Download

• Support Domino mail rule "Don't accept message"

Version 1.3.3 2020-07-28

147KB

Squirrel-1.3.3.zip

archive

Open

Download

• Fix regression error in 1.3.1/1.3.2 "Folder not open"

Version 1.3.2 2020-07-13

147KB

Squirrel-1.3.2.zip

archive

Open

Download

• Retry server login after receiving "EOF on socket"

Version 1.3.1 2020-07-11

147KB

Squirrel-1.3.1.zip

archive

Open

Download

• Retry server login after receiving "Temporary authentication failure"

Version 1.3.0 2019-12-02

148KB

Squirrel-1.3.0.zip

archive

Open

Download

• Add option to select all folders to be processed (IMAP servers only)

• Add option to process all messages (read and unread) once for complete mailbox migration (see Administrator Tips)

• Change product references to reflect re-branding (IBM to HCL)

• Code performance enhancements during Domino MIME message body creation

• Show 1 KB message size (instead of 0 KB) on console log for message size < 1 KB

• Add Notes item $SquirrelFolder with the folder name of the original message (see Developer Tips)

• Add check for required ACL roles to be active in configuration database (see Installation)

• Shortened the length of log and debug message to the console

Version 1.2.3 2019-08-12

• Correct bug when receiving Internet messages with text/html and base64 encoding

Version 1.2.2 2019-07-01

• Add 125ms delay between message fetching to avoid race conditions on the Internet mail server

• Set the Notes message item PostedDate to the original time of the message (see Developer Tips)

• Rename the Notes item $SquirrelSentDate to $SquirrelPostedDate and set it to the time of the Squirrel message processing

• Support encoded subject lines, which do not completely follow the RFC 2047 standard.

Version 1.2.1 2019-03-18

• Back-End: Correct display of encoded Internet sender addresses (e.g. "=?utf-8?..")

• Back-End: Minor code cleanup

Version 1.2.0 2019-03-09

• Remove unused action menu

• Mark Sqirrel.ntf as template in database properties

• Include JAddin 2.1.1 framework

• Use Domino router database mail1.box if mail.box is not present

• Correct possible loop while encountering startup errors

• Correct NullPointerException for missing sent date in MIME mail

• Support MIME messages which are mapped in Java API as com.sun.mail.util.BASE64DecoderStream

• Add Domino console log message every hour if no mail account document is active

• Force UTF-8 for all MIME character set conversions

Version 1.1.0 2019-02-22

• Configuration document: "Send sys msg to" is now a Domino directory names lookup field

• Internet mail account subscription: New field for comments

• Internet mail account views: Action button for set active/inactive

• Internet mail account views: Include columns for used connections and comments

• Squirrel.ntf template: Set default ACLs

• Minor code changes and cleanups

Version 1.0.0 2019-02-10

• First official release

Version 0.8.0 2019-02-05

• Third internal beta version - Feature completed

• Add all notification email for the administrator

Version 0.6.0 2019-01-19

• Second internal beta version

• Add support for POP3S and POP3

Version 0.5.0 2019-01-07

• First internal beta version

Version 0.1.0 2019-01-02

• First alpha version (Proof of concept)